** 1. paxil [paroxitenePaxil (paroxetine) is an antidepressant drug of selective serotonin reuptake inhibitors (SSRIs) group] and is used to treat depression, obsessive-compulsive disorder and anxiety, if you have gone for cold turkey i.e. abrupt and complete cessation to which you were addicted, thus stopping the drug abruptly and suddenly has followed with unpleasant withdrawal symptoms [feeling sick] 2. because you were taking zoloft [sertraline] which is also an antidepressant of SSRIs group, thus make sure you doesn t have high levels of SEROTONIN in the body, features of which to look out are: agitation,hallucinations, fever, fast heart rate, overactive reflexes, nausea, vomiting, diarrhea, loss of coordination, fainting. [call your doctor for medical advice about side effects]. 3. after quitting Paxil completely, it takes on average almost a full year for the body to recover because Paxil itself remains in the body for less than 24 hours, that s why if you miss a dose you feel terrible. [ it does so much dammage to the body and brains that you feel the withdrawal effects for months and sometimes years] PS i. because the body does undergo changes as a result of antidepressant treatment [2 years], so when you stop the medication, your body has to change back to its prior state and the transition can involve some of the distress you describe, solution is taper the drug very,very slowly.